Rei Tachibana is a fictional character from the anime and manga series Pani Poni Dash!. Known for her calm and composed demeanor, she serves as the class representative of Class 1-C at Momotsuki Academy. Despite her serious and stoic appearance, she often finds herself dealing with the comedic chaos surrounding her eccentric classmates and teacher, Rebecca Miyamoto. Rei is highly intelligent and often acts as the voice of reason, helping to manage the bizarre situations that occur. Her character adds a sense of balance and stability to the series' humorous and unpredictable narrative.